Jeep wrangler fixing p0128 is usually a pretty easy thing to do since 90 of the time it s going to be the thermostat that is throwing the code.
Check engine light on jeep wrangler 2013.
For jk wranglers checking the engine code is a relatively simple task.
The contact stated that while driving approximately 65 mph when the vehicle s check engine warning light illuminated and the vehicle began to reduce in power and speed.
Just complete the following steps.
My 92 jeep wrangler 4 0 started doing this about a week ago when i first start it up it runs rough like it s running out of gas the rpms goes up and down the check engine light comes on.
The contact reduced speed to about 20 mph and was able to get their vehicle to a nearby pepboys where a certified mechanic diagnosed that the vehicle had a misfire cylinder 6 and that it needed to be repaired.
Turn the engine on.
Push the key in and turn it to off and then to on three times leaving it in the on position.
This light is the centerpiece of your vehicle s on board diagnostics system obd.
A failing oxygen sensor also known as an o2 sensor is one of the most common reasons for that jeep check engine light to come on.
Insert key into the ignition.
When your jeep throws up a check engine light it means something is amiss and it has detected some mechanical problem with a component or an electrical signal error in the jeeps system.
The code is very vague since you ll never know what it means unless you have the service manual or an obd scanner that can give you more detail about the code.
Put the key in the ignition and turn it to the on position for about five seconds.
Turn to on position without starting the jeep.
How to check an engine code.
Since the 1980s many vehicles have been built to be run by the engine computer unit ecu which controls vehicle s drivetrain and auxiliary systems based on input from the vehicle s sensors this computer will make adjustments to your vehicle s performance to keep your ride running smoothly.
Tl the contact owns a 2013 jeep wrangler.
But an o2 sensor code will surely show up in a diagnostic test.
And the tricky thing with the o2 sensor is that the car will continue to drive well so you might want to dismiss the light.
Service engine soon other than the heater not working as good the only other symptom of p0128 is typically the service engine soon light itself.
The 2013 jeep wrangler has 10 problems reported for check engine light came on.